Folders: ROOT > ScienceBase Catalog > John Wesley Powell Center for Analysis and Synthesis > Evidence for shifts in plant species diversity along N deposition gradients: a first synthesis for the United States ( Show all descendants )
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Although precipitation is correlated with fire size in desert ecosystems and is typically used as an indirect surrogate for fine fuel load, a direct link between fine fuel biomass and fire size has not been established. In addition, nitrogen (N) deposition can affect fire risk through its fertilisation effect on fine fuel production. In this study, we examine the relationships between fire size and precipitation, N deposition and biomass with emphasis on identifying biomass and N deposition thresholds associated with fire spreading across the landscape. We used a 28-year fire record of 582 burns from low-elevation desert scrub to evaluate the relationship of precipitation, N deposition and biomass with the distribution...
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This chapter made use of examples based on extending the quantile regression analyses used in the water quality and hydrofracking (Bowen et al. 2015) and atmospheric nitrogen deposition and plant species richness (Simkin et al. 2016) working group publications. All the R code and data sets are archived on ScienceBase.
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Types: Citation
Atmospheric nitrogen (N) deposition has been shown to decrease plant species richness along regional deposition gradients in Europe and in experimental manipulations. However, the general response of species richness to N deposition across different vegetation types, soil conditions, and climates remains largely unknown even though responses may be contingent on these environmental factors. We assessed the effect of N deposition on herbaceous richness for 15,136 forest, woodland, shrubland, and grassland sites across the continental United States, to address how edaphic and climatic conditions altered vulnerability to this stressor. In our dataset, with N deposition ranging from 1 to 19 kg N⋅ha -1⋅y -1, we found...
Categories: Publication;
Types: Citation
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